Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Onderstepoort's shift into December is marked by a subtle change to a still moderately hot 28.5°C (83.3°F) from November's 28.1°C (82.6°F) in temperature. Throughout December, the nighttime temperature averages to a refreshing 17.5°C (63.5°F).Heat index
December's heat index is computed to be a tropical 30°C (86°F). Staying active during long-term exposure might result in a state of exhaustion and cause heat cramps.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', reflects the blend of air temperature and relative humidity to give a temperature impression. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
Humidity
In December, the average relative humidity in Onderstepoort is 60%.Rainfall
In December, in Onderstepoort, the rain falls for 20.4 days. Throughout December, 83mm (3.27") of precipitation is accumulated. In Onderstepoort, South Africa, during the entire year, the rain falls for 120.8 days and collects up to 421mm (16.57") of precipitation.Daylight
December has the longest days of the year, with an average of 13h and 42min of daylight.On the first day of December in Onderstepoort, sunrise is at 05:07 and sunset at 18:45. On the last day of the month, sunrise is at 05:19 and sunset at 19:01 SAST.
Sunshine
In December, the average sunshine is 11.4h.UV index
The months with the highest UV index are January through March, October through December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 6 during December translates into the following recommendations:
Deter overexposure. Protecting against the sun's effects is essential. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Frequently asked questions
How hot is it in Onderstepoort in December?
What is the average humidity in December in Onderstepoort?
How many days does it rain in December in Onderstepoort?
When are the longest days in Onderstepoort?
How many hours of daylight does Onderstepoort have in December?
What time are sunrise and sunset in December in Onderstepoort?
How many hours of sunshine does Onderstepoort have in December?
What are the months with the highest UV index in Onderstepoort?
What is the UV index intensity in December in Onderstepoort?
Average temperature in December
Onderstepoort, South Africa
- Average high temperature in December: 28.5°C
The warmest month (with the highest average high temperature) is January (28.7°C).
The month with the lowest average high temperature is June (19.1°C).
- Average low temperature in December: 17.5°C
The months with the highest average low temperature are January and December (17.5°C).
The coldest month (with the lowest average low temperature) is July (6.9°C).
Average pressure in December
Onderstepoort, South Africa
- Average pressure in December: 1013.3mbar
The month with the highest atmospheric pressure is July (1024.6mbar).
The month with the lowest atmospheric pressure is January (1013mbar).
Average wind speed in December
Onderstepoort, South Africa
- Average wind speed in December: 9.5km/h
The windiest month (with the highest average wind speed) is November (11.1km/h).
The calmest month (with the lowest average wind speed) is May (7.3km/h).
Average humidity in December
Onderstepoort, South Africa
- Average humidity in December: 60%
The months with the highest relative humidity are January and February (62%).
The month with the lowest relative humidity is September (35%).
Average rainfall in December
Onderstepoort, South Africa
- Average rainfall in December: 83mm
The wettest month (with the highest rainfall) is January (92mm).
The driest month (with the least rainfall) is July (0mm).
Average rainfall days in December
Onderstepoort, South Africa
- Average rainfall days in December: 20.4 days
The month with the highest number of rainy days is January (21.5 days).
The month with the least rainy days is July (1.1 days).
Average daylight in December /
Average sunshine in December
Onderstepoort, South Africa
- Average daylight in December: 13h and 4min
The month with the longest days is December (Average daylight: 13h and 42min).
The month with the shortest days is June (Average daylight: 10h and 36min).
- Average sunshine in December: 11h and 2min
The month with the most sunshine is October (Average sunshine: 11h and 54min).
The month with the least sunshine is August (Average sunshine: 7h and 30min).
Average sunshine days in December
Onderstepoort, South Africa
- Average sunshine days in December: 6.5 days
The month with the most sunshine days is July (29.6 days).
The month with the least sunshine days is December (6.5 days).
Average UV index in December
Onderstepoort, South Africa
- Average UV index in December: 6
The months with the highest UV index are January, February, March, October, November and December (UV index 6).
The months with the lowest UV index are May, June and July (UV index 4).
Average cloud cover in December
Onderstepoort, South Africa
- Average cloud cover in December: 25
The month with the most cloud cover is January (Cloud cover 26).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in December
Onderstepoort, South Africa
- Average visibility in December: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
Onderstepoort, South Africa
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